Scottish Government acknowledged there remains a risk of further disruption due to the coronavirus pandemic.
The SQA plans to run a full diet of exams next spring but is preparing contingencies, John Swinney said.
First Minister Nicola Sturgeon and her deputy, John Swinney, were forced to backtrack after initially branding the process 'credible'.
This year's results based on teacher estimates after exams were cancelled due to the coronavirus pandemic.
The exams authority has said it will not consult schools or colleges if it downgrades teacher estimates.
The FM said proposals for at-school and at-home learning will not last 'a single second longer than necessary'.
Holyrood's education committee has raised concerns over the new grading system to replace cancelled exams.
John Swinney told MSPs that coursework, existing grades and prior attainment will be used to assess grades.